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# [RHSA-2009:0261-01] Moderate: vnc security update

- From: bugzilla redhat com
- To: rhsa-announce redhat com, enterprise-watch-list redhat com
- Cc:
- Subject: [RHSA-2009:0261-01] Moderate: vnc security update
- Date: Wed, 11 Feb 2009 12:08:26 -0500

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    =====================================================================
                       Red Hat Security Advisory

    Synopsis:          Moderate: vnc security update
    Advisory ID:       RHSA-2009:0261-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-0261.html
    Issue date:        2009-02-11
    CVE Names:         CVE-2008-4770
    =====================================================================

    1. Summary:

    Updated vnc packages to correct a security issue are now available for Red
    Hat Enterprise Linux 3, 4, and 5.

    This update has been rated as having moderate security impact by the Red
    Hat Security Response Team.

    2. Relevant releases/architectures:

    Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
    Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
    Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

    3. Description:

    Virtual Network Computing (VNC) is a remote display system which allows you
    to view a computer's "desktop" environment not only on the machine where it
    is running, but from anywhere on the Internet and from a wide variety of
    machine architectures.

    An insufficient input validation flaw was discovered in the VNC client
    application, vncviewer. If an attacker could convince a victim to connect
    to a malicious VNC server, or when an attacker was able to connect to
    vncviewer running in the "listen" mode, the attacker could cause the
    victim's vncviewer to crash or, possibly, execute arbitrary code.
    (CVE-2008-4770)

    Users of vncviewer should upgrade to these updated packages, which contain
    a backported patch to resolve this issue. For the update to take effect,
    all running instances of vncviewer must be restarted after the update is
    installed.

    4. Solution:

    Before applying this update, make sure that all previously-released
    errata relevant to your system have been applied.

    This update is available via Red Hat Network.  Details on how to use
    the Red Hat Network to apply this update are available at
    http://kbase.redhat.com/faq/docs/DOC-11259

    5. Bugs fixed (http://bugzilla.redhat.com/):

    471777 - VNC Free Edition 4.1.3 fixes a  possible security vulnerability only present in the listening viewer. VNC Server is not compromised.
    480590 - CVE-2008-4770 vnc: vncviewer insufficient encoding value validation in CMsgReader::readRect

    6. Package List:

    Red Hat Enterprise Linux AS version 3:

    Source:
    ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/vnc-4.0-0.beta4.1.8.src.rpm

    i386:
    vnc-4.0-0.beta4.1.8.i386.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
    vnc-server-4.0-0.beta4.1.8.i386.rpm

    ia64:
    vnc-4.0-0.beta4.1.8.ia64.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.ia64.rpm
    vnc-server-4.0-0.beta4.1.8.ia64.rpm

    ppc:
    vnc-4.0-0.beta4.1.8.ppc.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.ppc.rpm
    vnc-server-4.0-0.beta4.1.8.ppc.rpm

    s390:
    vnc-4.0-0.beta4.1.8.s390.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.s390.rpm
    vnc-server-4.0-0.beta4.1.8.s390.rpm

    s390x:
    vnc-4.0-0.beta4.1.8.s390x.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.s390x.rpm
    vnc-server-4.0-0.beta4.1.8.s390x.rpm

    x86_64:
    vnc-4.0-0.beta4.1.8.x86_64.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
    vnc-server-4.0-0.beta4.1.8.x86_64.rpm

    i386:
    vnc-4.0-0.beta4.1.8.i386.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
    vnc-server-4.0-0.beta4.1.8.i386.rpm

    ia64:
    vnc-4.0-0.beta4.1.8.ia64.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.ia64.rpm
    vnc-server-4.0-0.beta4.1.8.ia64.rpm

    x86_64:
    vnc-4.0-0.beta4.1.8.x86_64.rpm
    vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
    vnc-server-4.0-0.beta4.1.8.x86_64.rpm

    Red Hat Enterprise Linux Desktop (v. 5 client):

    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/vnc-4.1.2-14.el5_3.1.src.rpm

    i386:
    vnc-4.1.2-14.el5_3.1.i386.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.i386.rpm
    vnc-server-4.1.2-14.el5_3.1.i386.rpm

    x86_64:
    vnc-4.1.2-14.el5_3.1.x86_64.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.x86_64.rpm
    vnc-server-4.1.2-14.el5_3.1.x86_64.rpm

    Red Hat Enterprise Linux (v. 5 server):

    Source:
    ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/vnc-4.1.2-14.el5_3.1.src.rpm

    i386:
    vnc-4.1.2-14.el5_3.1.i386.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.i386.rpm
    vnc-server-4.1.2-14.el5_3.1.i386.rpm

    ia64:
    vnc-4.1.2-14.el5_3.1.ia64.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.ia64.rpm
    vnc-server-4.1.2-14.el5_3.1.ia64.rpm

    ppc:
    vnc-4.1.2-14.el5_3.1.ppc.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.ppc.rpm
    vnc-server-4.1.2-14.el5_3.1.ppc.rpm

    s390x:
    vnc-4.1.2-14.el5_3.1.s390x.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.s390x.rpm
    vnc-server-4.1.2-14.el5_3.1.s390x.rpm

    x86_64:
    vnc-4.1.2-14.el5_3.1.x86_64.rpm
    vnc-debuginfo-4.1.2-14.el5_3.1.x86_64.rpm
    vnc-server-4.1.2-14.el5_3.1.x86_64.rpm

    These packages are GPG signed by Red Hat for security.  Our key and
    details on how to verify the signature are available from
    https://www.redhat.com/security/team/key/#package

    7. References:

    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4770
    http://www.redhat.com/security/updates/classification/#moderate

    8. Contact:

    The Red Hat security contact is <secalert redhat com>.  More contact
    details at https://www.redhat.com/security/team/contact/

    Copyright 2009 Red Hat, Inc.
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